Transcript Integumentary System

Syrian Private University
Medical Faculty
Medical Terminology
M.A.Kubtan , MD – FRCS
Lecture 3
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•Name the parts of the Integumentary system and
discuss the function of each part.
•Define the combining forms used in building words
that relate to the Integumentary system.
•Identify the meaning of related abbreviations.
•Name the common diagnoses, laboratory tests and
clinical procedures used in testing and treating the
Integumentary system.
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Objectives Part 2
•Define the major pathological
conditions of the Integumentary
system.
•Define surgical terms related to
the Integumentary system.
•List common pharmacological
agents used in treating the
Integumentary
system.
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Skin is the and
largest
organ of the body, and
Structure
Function
serves to:
•Protect against injury
•Protect against the sun UV rays
•Prevent entry of harmful microorganisms
•Maintain the proper internal body
temperature
•Excrete waste materials through
perspiration
•Function as a sense organ
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Three Layers of the Skin
Three Layers of Skin
Epidermis or stratified squamous epithelium
Stratum corneum
Basal layer includes
melanocytes
Nerves, vessels, glands, hair follicles
Dermis or corium
Connective tissue (mostly lipocytes)
Subcutaneous
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epidermis
Epidermal Layer
Epidermal
Layer
•Outermost skin layer
•Consists of several
sublayers
•Top sublayer is called the
stratum corneum
•Nonvascular
•Keratin is found in the
cells
•Stratum germinativum is the
bottom sublayer where new
cells are produced that push
up toward the stratum
corneum
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Dermal Layer
dermis
•Collagen fibers are found
in the connective tissue
and when collagen fibers
stretch, they form striae
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Dermal Layer
•Also called the corium
•Contains two sublayers
the papillary layer and
the reticular layer
•Holds many capillaries,
lymph cells, nerve
endings, sebaceous and
sweat glands and hair
follicles
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Subcutaneous
Subcutaneous
LayerLayer
•Also called the hypodermis
•Found between the dermal layer
and the inner organs
•Consists of adipose or fatty
tissue and some fibrous tissue
•Fatty tissue protects
inner organs and
maintains body
temperature
•Blood vessels and
nerves are present
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subcutaneous
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Hair
Hair
•Hair grows out of the epidermis to cover parts of
the body.
•The shaft is what we see and the root lies
below the surface of the skin.
Hair color is determined by the presence
of melanin.
Baldness or alopecia may result from
heredity, disease, injury, or
chemotherapy.
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Nails
Nails
•Nails are plates
made of hard keratin
that cover the dorsal
surface of the fingers
and toes.
•At the base of most nails a lunula or whitish
half-moon is an area where keratin and other
cells have mixed with air.
•The cuticle is a narrow band of epidermis that
surrounds the base or bottom of nails.
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Glands
Glands
•Sudoriferous glands, also known as sweat
glands, secrete outward toward the surface of the
body (exocrine) and are located almost
everywhere on the body.
Types of exocrine glands
Eccrine
Apocrine
Sebaceous
•The excretion of sweat is called diaphoresis.
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Combining Forms
Combining Form
Meaning
•adip(o)
fatty
•dermat(o)
skin
•hidr(o)
sweat, sweat glands
•ichthy(o)
fish, scaly
•kerat(o)
horny tissue
•lip(o)
fatty
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Combining
Forms
Part
2
Combining Form
Meaning
•melan(o)
black, very dark
•myc(o)
fungus
•onych(o)
nail
•pil(o)
hair
•seb(o)
sebum
•steat(o)
fat
•trich(o)
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Dermatology
The field of Dermatology studies, diagnoses, and
treats ailments of the skin.
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Exudate/Fungi
•Exudate (pus) is material that passes out of
tissues. The laboratory can use this to determine
the types of bacteria present.
•A scraping can also be done and placed on a
growth medium to identify the presence of fungi.
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